Make it run the beta server

[tiennou]

This is the bare minimum needed to make it build and run v4.3.0-beta, which runs on at least Node 22 (I've picked 24 since that's what o4 confirmed they were running on). I'm not sure how to manage publishing that with a beta tag, but that's what I've been testing on.

Known issues:

• npm run cli doesn't work; there appears to be an issue with the beta cli tool, so you'd have to netcat localhost 21026 from within the container at the moment (which means building your own image and add netcat-openbsd to the list of stuff apt installs
• it needs a special version of screepsmod-mongo to start up properly, otherwise runners and backend are gonna crash on start up as they try to access a database that's not fully initialized and get unexpected data out of it.

[tiennou]

Okay, updated to use the released version of the server. I also found the issue with the CLI being broken; that has to do with Node being weird with binding to "localhost" when it's IPv6 vs connecting to "localhost". The latter assumes IPv4 would also be there, which fails and just drops the connection entirely.

If you were wondering why the sed hacking into .screepsrc, that's why.

[Jomik]

There are some checks on matrix.node that we need to adjust, probably to use 22 if that is what official will target.
This is just so that the "official" server is without the -node24.